# Convert ASF to AMR

> Convert ASF to AMR online for free in seconds. Files are processed in a secure, isolated sandbox and deleted automatically. No sign-up, no watermarks.

URL: https://www.converterrr.com/asf-to-amr

- Runs in an isolated cloud sandbox with FFmpeg: files are deleted automatically, and the job uses cloud credits.
- Engines: FFmpeg (cloud).
- API: available. `POST /api/v1/jobs` with `"output_format": "amr"` (paid plans).
- More: [Video converter](https://www.converterrr.com/video-converter), [ASF converter](https://www.converterrr.com/asf-converter).

## How to convert ASF to AMR

1. **Add your ASF files.** Drag and drop ASF files onto the converter, paste them, or click to browse. You can add several at once.
2. **Choose AMR.** AMR is already selected. Open Options if you want to change quality, size or metadata.
3. **Convert.** Click Convert. Files are processed in a secure cloud sandbox and are usually ready in seconds.
4. **Download your AMR.** Download each AMR file, or everything at once as a ZIP.

## Good to know

- Only the audio track is kept — the result is an AMR file you can play anywhere. Use Options to pick a bitrate.
- ASF files are typically used for legacy Windows Media streams, while AMR is best for voice recordings from older phones.
- This conversion runs on FFmpeg in an isolated cloud sandbox. Files are encrypted in transit and deleted automatically.

## ASF vs AMR

|  | ASF | AMR |
| --- | --- | --- |
| Full name | Advanced Systems Format | Adaptive Multi-Rate |
| Type | Video | Audio |
| Extensions | .asf | .amr |
| MIME type | video/x-ms-asf | audio/amr |
| Best for | legacy Windows Media streams | voice recordings from older phones |
| Properties | legacy format | lossy compression, legacy format |

**ASF:** ASF is Microsoft's streaming container behind WMV and WMA files.

**AMR:** AMR is a speech codec used by mobile phones for voice recordings and calls.

## Related conversions

- [ASF to MP4](https://www.converterrr.com/asf-to-mp4) (in the browser)
- [MP3 to AMR](https://www.converterrr.com/mp3-to-amr) (cloud)
- [ASF to MP3](https://www.converterrr.com/asf-to-mp3) (in the browser)
- [MP4 to AMR](https://www.converterrr.com/mp4-to-amr) (cloud)
- [ASF to WebP](https://www.converterrr.com/asf-to-webp) (in the browser)
- [WAV to AMR](https://www.converterrr.com/wav-to-amr) (cloud)
- [ASF to MOV](https://www.converterrr.com/asf-to-mov) (in the browser)
- [MOV to AMR](https://www.converterrr.com/mov-to-amr) (cloud)
- [ASF to GIF](https://www.converterrr.com/asf-to-gif) (in the browser)
- [M4A to AMR](https://www.converterrr.com/m4a-to-amr) (cloud)
- [ASF to WAV](https://www.converterrr.com/asf-to-wav) (in the browser)
- [WebM to AMR](https://www.converterrr.com/webm-to-amr) (cloud)

## Convert ASF to other formats

[ASF to MP4](https://www.converterrr.com/asf-to-mp4), [ASF to MP3](https://www.converterrr.com/asf-to-mp3), [ASF to WebP](https://www.converterrr.com/asf-to-webp), [ASF to MOV](https://www.converterrr.com/asf-to-mov), [ASF to GIF](https://www.converterrr.com/asf-to-gif), [ASF to WAV](https://www.converterrr.com/asf-to-wav), [ASF to WebM](https://www.converterrr.com/asf-to-webm), [ASF to MKV](https://www.converterrr.com/asf-to-mkv), [ASF to M4A](https://www.converterrr.com/asf-to-m4a), [ASF to AVI](https://www.converterrr.com/asf-to-avi), [ASF to FLAC](https://www.converterrr.com/asf-to-flac), [ASF to AAC](https://www.converterrr.com/asf-to-aac), [ASF to OGG](https://www.converterrr.com/asf-to-ogg), [ASF to WMV](https://www.converterrr.com/asf-to-wmv), [ASF to Opus](https://www.converterrr.com/asf-to-opus), [ASF to FLV](https://www.converterrr.com/asf-to-flv), [ASF to M4V](https://www.converterrr.com/asf-to-m4v), [ASF to MPEG](https://www.converterrr.com/asf-to-mpeg), [ASF to 3GP](https://www.converterrr.com/asf-to-3gp), [ASF to WMA](https://www.converterrr.com/asf-to-wma), [ASF to MPG](https://www.converterrr.com/asf-to-mpg), [ASF to TS](https://www.converterrr.com/asf-to-ts), [ASF to AIFF](https://www.converterrr.com/asf-to-aiff), [ASF to VOB](https://www.converterrr.com/asf-to-vob)

## Convert other formats to AMR

[MP3 to AMR](https://www.converterrr.com/mp3-to-amr), [MP4 to AMR](https://www.converterrr.com/mp4-to-amr), [WAV to AMR](https://www.converterrr.com/wav-to-amr), [MOV to AMR](https://www.converterrr.com/mov-to-amr), [M4A to AMR](https://www.converterrr.com/m4a-to-amr), [WebM to AMR](https://www.converterrr.com/webm-to-amr), [FLAC to AMR](https://www.converterrr.com/flac-to-amr), [MKV to AMR](https://www.converterrr.com/mkv-to-amr), [AAC to AMR](https://www.converterrr.com/aac-to-amr), [AVI to AMR](https://www.converterrr.com/avi-to-amr), [OGG to AMR](https://www.converterrr.com/ogg-to-amr), [WMV to AMR](https://www.converterrr.com/wmv-to-amr), [Opus to AMR](https://www.converterrr.com/opus-to-amr), [WMA to AMR](https://www.converterrr.com/wma-to-amr), [FLV to AMR](https://www.converterrr.com/flv-to-amr), [M4V to AMR](https://www.converterrr.com/m4v-to-amr), [MPEG to AMR](https://www.converterrr.com/mpeg-to-amr), [3GP to AMR](https://www.converterrr.com/3gp-to-amr), [AIFF to AMR](https://www.converterrr.com/aiff-to-amr), [MPG to AMR](https://www.converterrr.com/mpg-to-amr), [TS to AMR](https://www.converterrr.com/ts-to-amr), [M4B to AMR](https://www.converterrr.com/m4b-to-amr), [MTS to AMR](https://www.converterrr.com/mts-to-amr), [VOB to AMR](https://www.converterrr.com/vob-to-amr)

## ASF to AMR: frequently asked questions

### How do I convert ASF to AMR?

Drop your ASF file onto the converter above, make sure AMR is selected, and click Convert. When it's done, download the AMR file — it usually takes a few seconds.

### Is it safe to convert ASF to AMR here?

Yes. Your file is sent over an encrypted connection to an isolated sandbox that's created for your job only, then both the original and the result are deleted automatically.

### Is the ASF to AMR converter free?

Yes. Cloud conversions like this one use credits, and you get free credits every day (3 without an account, 10 with a free account).

### Will converting ASF to AMR reduce quality?

AMR is a lossy format, but our defaults are tuned to be visually indistinguishable for most files. You can raise the quality under Options.

### Can I convert multiple ASF files at once?

Yes. Add up to 5 files at a time without an account, 10 with a free account and up to 500 on paid plans, then download them individually or as a single ZIP.